Alert archive / North Carolina / Areal Flood Advisories in 2021

Areal Flood Advisory 71, NWS Wilmington, NC

September 22, 2021Brunswick County, Columbus County, North Carolina

NWS Wilmington, NC issued this areal flood advisory at Sep 22, 2021, 9:07 AM EDT for Brunswick County, Columbus County, North Carolina. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Sep 22, 2021, 9:07 AM EDT (13:07 UTC)
Expired: Sep 22, 2021, 12:15 PM EDT
In force: 3 hr
Issued by: NWS Wilmington, NC
Area: Storm-based polygon

Counties Brunswick County, NC, Columbus County, NC

The radar

The Wilmington radar (KLTX), 18 km from the middle of the area, began a volume at 13:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 1.1 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 773 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, NC wrote its last area forecast discussion before this areal flood advisory went out at Sep 22, 8:40 AM EDT, 27 minutes earlier.

Area forecast discussion, Sep 22, 8:40 AM EDT, 27 minutes before

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Hazardous weather outlook, Sep 22, 8:24 AM EDT, 43 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 21, 8:13 PM EDT	Coastal Flood Advisory	ILM	New Hanover	4 hr
Sep 21, 8:13 PM EDT	Rip Current Statement	ILM	New Hanover, Pender	24 hr
Sep 22, 3:22 AM EDT	Small Craft Advisory	ILM		27 hr
Sep 22, 7:33 AM EDT	Coastal Flood Advisory	ILM	New Hanover	5 hr
Sep 22, 10:21 AM EDT	Flash Flood Warning	ILM	Brunswick, Columbus, Pender	6 hr
Sep 22, 10:39 AM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover	111 min
Sep 22, 11:24 AM EDT	Areal Flood Advisory	ILM	New Hanover, Pender	111 min
Sep 22, 12:22 PM EDT	Flash Flood Warning	ILM	New Hanover	5 hr
Sep 22, 1:16 PM EDT	Areal Flood Advisory	ILM	Bladen, Brunswick, New Hanover, Pender	119 min
Sep 22, 2:35 PM EDT	Special Weather Statement	ILM	Columbus	25 min
Sep 22, 2:44 PM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover	3 hr

Nearby

Areal Flood Advisories in North Carolina, 2021 Every areal flood advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.